# NEET Chemistry The Solid State Questions Solved

BOARD

Tungsten crystallizes in body centred cubic unit cell. If the edge of the unit cell is 316.5 pm, what is the radius of tungsten atom?

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Concept Questions :-

Density/Formula/packing fraction/ Semiconductors

For bcc, unit cell : radius, r = $\frac{\sqrt{3}a}{4}$($\because$ a = 316.5 pm)

$\frac{\sqrt{3}×316.5pm}{4}$ = $\frac{1.732×316.5pm}{4}$ = 137 pm

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